Answer:
this shows that at one point these animals lived on the surface because there were plants for them to eat
Explanation:
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When air is heated up the molecules spread out and move faster, so heat rises because it is less dense than the cooler air around it.
Answer:
A polar molecule is a molecule that has a positive and negative charge at either end.
The answer is B.
neutral: OH- = H+
acid: H+ > OH-
base OH- > H+
I believe it is D, to protect weakened ecosystems and their wildlife
